Casting machine



Fe l 1927.

b w. E. cLow CASTING MACHINE Filed Feb. e, 1922 4 l v 1 n 1 .lllln/ Jik? mig@ www.

Patented Feb. 1, 1927.

WILLIAM E. CLOW, OF CHICAGO, ILLINOIS,

PATENT OFFICE.

ASSIGNOR TO JAMES B. GLOW 85 SONS,

" CHICAGO, ILLINOIS, A CORPORATION OF ILLINOIS.

CASTING MACHINE.

y Application led February The present invention relates to castingmachines of that type in which molten` metal is charged into a rotatingmold and4 centrifugally cast against the interior sur-A face `ofthemold. Its principal object is the provision of sucha casting machineprac'- tically operable for the eiticient and economical casting ofhollow articles. The inven-l tion-provides a machine especially adaptedfor the production of elongated articles such as pipe, by chargingmolten metal onto the rotating mold surface at longitudinally `separatedpoints and in such manner that the metal is directed onto the moldsurface in .thefdirection of rotation thereof and at an acute angle withrelation to the mold sur-v face. A preferred .form of machineembodying-the invention is illustrated in the'drawings and explained inthe following description.

Figure 1 is a broken vertical section of a machine embodying theinvention. Figure 2 is an end elevation thereof.

Figure 3 is a section on the line 3--3 in Figure 1. v Y

Figure 4 is an enlarged section of the distributing trough on the line4--4 in Figure 1.

-The Imachine as a whole stands on a suitable concrete or other base 1.A lurality of suitable standards 2 are secure t0. the base and a casing3 is ri idly and tixedly supported by the standar s. The casing 3 ispreferably constructed of cast iron. A mold 4, preferably made of forgedsteel, is rotatably mounted within the casing 3. The mold may beconveniently mounted within the easing by securing a pair of spacedroller bearings 5 in the casing adjacent the .op-

posite ends thereof and supporting the mold on these bearings. A pulley6 is secured to the mold at what may be called the rea-r end whichprojects beyond the casing and^ power may be suitably transmitted -tothe pulley to rotate the mold at high speed. Preferably, ball bearings 7and labyrinth or other suitable packings 8 are provided between themold'and casing adjacent the opposite ends thereof. It is practicallydesirable to mount the ball bearmgs and packing at the rear end of thecasing, so caged thatthey are incapable of movement with respect eitherto the mold or the casing. At the front end of the machine the bearingand packing are preferably secured in `a. cage e, 1922. serial No.534,352.

which is incapable of longitudinal movement with respect to the mold butwhich has a sliding fit within the casing to provide for movement due toexpansion of the mold during operation. Both ends of the mold` are open.At the rear end of the mold a flanged annular stop 9 is secured Vin thebore of the lmold. The front end ofthe mold. is enlarged -l'and securedtherein isl a core 10 suitably Ishaped so that the bellf end of a pipewill be cast `between the opposing surfaces of-the core and theenlarged'bore of the mold. The

body of the core 10d-ray be formed of metal.

or sand as desired and may be -conveniently secured in place by havingthe mold project slightly beyond the front end of the casing and drivingwedges throu h holes 11 formed in the projecting end of-t e mold.

A track 12 is supported on the base 1 and extends rearwardly from therear end of the mold and casing. A carriage 13 is mounted on the trackby providing the carriage with `wheels 14 rolling on the upper surfaceof the track and with wheels 15 engaging the under surface of the track.A distributing trough 16 is rotatably supported by the carriage 13 andthis is preferably accomplished by providing the carriage with spacedstandards 17 housing suitable antifriction bearings 18. di-

rectly supporting the trough. A worm gear 19 is secured on the troughand meshes with i 'a worm 20 journaled on the carriage and operable by acrank 21. Longitudinal movement of the carriage rearwardly from the moldwithdraws the distributing trough from the mold so that a castv pi e maybe withdrawn from the front end o the mold and so that the trough whendesired Amay be j on avertical axis so that it may be swung out oftheway after withdrawal of the trou h to allow removal of the pipe from themol That portion of the distributing troughwhich is adapted to beprojected into v the mold is preferably formed by a cast steel shell 25lined with re brick or other refractory material 26. That portion of thedistributing trough which lies within the mold when the trough isprojected into tilling position is` formed with a plurality oflongitudinally separated discharge sponts 27 and preferably this portionof the'trough is provided with an opening in its top and 'the spouts areformed in one edge of the opening. That portion of the trough which infilling position of thc trough projects beyond the front end of the moldand the casing is formed with a filling opening 28. That edge 29 whichcorresponds with the edge in which the discharge spouts arc formedextends to a higher level than the spouts. A transverse partition 30-isformed within the trough adjacent the rear end of that portion of thetrough which lies within the mold. The casing 3 is provided with a waterinlet 31 and a water outlet 32 connecting with the space between thecasing and the mold so that cooling water may be freely circulatedaround the mold.

In operation, after the bell forming core has been secured in. the frontend of the mold, the carriage is advanced to project the distributingtrough into operative position, in which it is illustrated in Figure 1.The mold is then rotated at high speed. Molten metal is charged ,in thatportion of the trough projecting beyond the front of the mold andcasing. As soon as the trough is filled with molten metal the worm gearis operated to rotate the trough and pour the metal into the rotatingmold. The high edge of the filling opening on the discharge side of thetrough prevents an metal from y being spilled outside of the mo d and asthe the mold durin trough empties the surplus metal in the projectingend of the trough will run back and be dischargednear the front end ofthe mold to cast the bell end of the pipe.A The dischar e outlets orspouts in that portion of the istributor or trough ositioned within thecastmg operation are yso formed and sposed that as the molten metal ischarged into the mold it will bei directed onto the rotating moldsurface in the direction of rotation thereof and at an acute angle withrelation to the mold surface. The molten metal is thus delivered to themold surface quietly and without agitation, so that it may be said to belaid onto the mold surface. In the preferred machine illustrated,tl1edistributor isl rotated so that the molten metal is delivered onto themold surface gradually. The discharge s outs through which the. moltenmetal ows from the trough into the mold are longitudinally separated sothat the metal -flo'ws into the mold'and onto the mold surface instreams which are spa-ced apart along thel mold. Air and gas arepermltted freely to esca inwardly from 'the mold sur. face toward t eaxis of the mold between the inowing separated streams of metal, sothatv before the adjacent streams ofV metal flowed into the mold haveunited the metal has inwardly'displaced all air and gas. The trapping ofair and gas between the metal and mold surface is wholly prevented andthe resulting )ipe will be devoid of pockets, blow holes and otherimperfections. After the pipe has been cast the distributing trough iswithdrawn, the guiding roller at the front of the mold is swung out otthe way and the wedges holding the core in position are displaced,whereupon the pipe and core may be readily withdrawn from the frontendof the mold and the' core removed from the pi e.

Having thus described my invention', w lat I claim as new and desire tosecure by Letters Patent of the United States is l.In a casting machine,the combination ot' an elongated rotary mold, and a distributor adaptedto extend within the mold and provided with longitudinally separateddischarge outlets adapted to direct molten rmetal onto the mold surfaceat an acute angle and in the direction of rotation thereof.

2. In a casting machine, the combination of an elongated rotary mold,and a rotatable distributor adapted to extend within .the mold andprovided with longitudinally separated discharge outlets.

3. In a casting machine, the combination of an elongated rotary mold,and a rotatable ydistributing trough adapted to extend within the mold,the trough being open at the top and provided along one edge of theopening with longitudinally separated discharge spouts.

4. In a casting machine, the combination of an elongated rotary mold,and a rotatable distributor ada ted to extend within the inold andprovided with longitudinally separated discharge'outlets adapted todirect molten metal onto the mold surface at an acute angle and in thedirection of rotation thereof.` f

5. In a casting machine, the combination of an elongated rotary mold,and a rotatable distributor ada ted to extend within the mold and provied with longitudinally separated discharge outlets, the distributorbeing provided with a filling opening beyond one end of the mold.

6. In a casting machine, the combination of an elongated rotary mold,and a rotatable distributor adapted to extendwithin the mold and toproject beyond one end thereof, the portion of the distributor within.the mold being open at the top and provided along one edge of theopening with lonvitudinally separated discharge outlets, t e projectingportion being provided with a filling opemng, the edge thereofcorresponding with said outlet e ge b/eing higher than the outlets. e

lill) 7. In a casting machine, the combination ,of an elongatedrotarymold; a longitudinally movable carriage, and a distributorsupported by the carriage and adapted to be projected within the mold,thel distributor .being provided with longitudinally separated dischargeoutlets adapted to dir'ect molten metal onto the lnold surface at anacute angle and in the direction ot' rotation thereof, and beingprovided with a lilling opening beyond one end ot' the mold.

In a. casting machine, the combination ot' an elongated rotary mold, alongitudinally movable carriage, and a distributor rotatably supportedby the carriage and adapted lo be projected within the mold, thedistributor being provided with longitudinally .separated dischargeoutlets.

S). In a casting machine, the combination ot' an elongated rotary mold,a longitudinally movable carriage, and a distributor rotatably supportedby the carriage and adapted to be projected Within the mold, thedistributor being provided with longitudinally separated dischargeoutlet-s, and being provided With a filling opening beyond one end ofthe mold.

'10. In a casting machine, the combination ot an elongated rotary mold,a longitudinally movable carriage, `a distributor rotatably supported bythe carriage and adapted to be projected Within the mold, thedistributor being provided with longitudinally separated dischargeoutlets, and means for rotating the distributor gradua lv.

11. In a casting machine, the combination of an elongated rotary mold, alongitudinally movable carriage, a distributor rotatably supported bythe carriage and adapted to be projected Within the mold, thedistribntor being open at the top and provided along one edge of theopening with longitudinally separated discharge outlets, .and means forrotating the distributor gradually.

12. In a casting machine, the combination of an elongated rotary moldopen at its ends. a longitudinally movable carria e mounted at one endof the mold, and a istributing trough rotatably supported` by thecarriage and adapted to extend through-`r the mold and to project beyondthe opposite end thereof, the portion of the trough Within the moldbeing open at the topl and provided along one edge ofithe opening withlongitudinally separated ldischarge spouts, tli'e projecting portion ofthe trough being provided with an opening in its top, the edge thereot'corresponding with said spout edge being higher'. than the spoutsl i3.In a casting machine, the combination of an elongated rotary mold openat its ends, a longitudinally movable carriage mounted at one end ot'the mold, a distributing trough rotatably supported by the carriage andadapted to extend through the mold and to project beyond the oppositeend thereof, the portion of the trough Within the mold being open -atthe top and provided along one edge of the opening with longitudinallyseparated discharge spouts, the projecting portion of the trough beingprovided with an opening in its top, the edge thereof corresponding Withsaid spout edge being higher than the spouts, and. means for rotatingthe trough gradually.

In Witness whereof, I hereunto subscribe my name this 3rd day oflFebruary, 1922.

WILLIAM E. GLOW.

